Merge branch 'wip/smcv/memdup2' into 'master'

backports: Add a backport of g_memdup2()

See merge request GNOME/libglnx!46

LICENSES/LicenseRef-old-glib-tests.txt

@@ -0,0 +1,16 @@
+This work is provided "as is"; redistribution and modification
+in whole or in part, in any medium, physical or electronic is
+permitted without restriction.
+
+This work is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+In no event shall the authors or contributors be liable for any
+direct, indirect, incidental, special, exemplary, or consequential
+damages (including, but not limited to, procurement of substitute
+goods or services; loss of use, data, or profits; or business
+interruption) however caused and on any theory of liability, whether
+in contract, strict liability, or tort (including negligence or
+otherwise) arising in any way out of the use of this software, even
+if advised of the possibility of such damage.

glnx-backports.h

@@ -1,8 +1,10 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
  *
+ * Copyright 1998 Manish Singh
+ * Copyright 1998 Tim Janik
  * Copyright (C) 2015 Colin Walters <walters@verbum.org>
  * Copyright 2017 Emmanuele Bassi
- * SPDX-License-Identifier: LGPL-2.0-or-later
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  * 
  * GLIB - Library of useful routines for C programming
  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
@@ -10,7 +12,7 @@
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -18,13 +20,13 @@
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 
 #pragma once
 
+#include <string.h>
+
 #include <gio/gio.h>
 
 G_BEGIN_DECLS
@@ -85,6 +87,28 @@ gboolean              glnx_set_object  (GObject **object_ptr,
 #define G_DBUS_METHOD_INVOCATION_UNHANDLED FALSE
 #endif
 
+#if !GLIB_CHECK_VERSION(2, 68, 0)
+static inline gpointer _glnx_memdup2 (gconstpointer mem,
+                                      gsize         byte_size) G_GNUC_ALLOC_SIZE(2);
+static inline gpointer
+_glnx_memdup2 (gconstpointer mem,
+               gsize         byte_size)
+{
+  gpointer new_mem;
+
+  if (mem && byte_size != 0)
+    {
+      new_mem = g_malloc (byte_size);
+      memcpy (new_mem, mem, byte_size);
+    }
+  else
+    new_mem = NULL;
+
+  return new_mem;
+}
+#define g_memdup2 _glnx_memdup2
+#endif
+
 #ifndef G_OPTION_ENTRY_NULL   /* added in 2.70 */
 #define G_OPTION_ENTRY_NULL { NULL, 0, 0, 0, NULL, NULL, NULL }
 #endif

tests/meson.build

@@ -33,6 +33,7 @@ if get_option('tests')
   )
 
   test_names = [
+    'backports',
     'errors',
     'fdio',
     'macros',

tests/test-libglnx-backports.c

@@ -0,0 +1,36 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
+ * Copyright 2019 Emmanuel Fleury
+ * SPDX-License-Identifier: LGPL-2.1-or-later AND LicenseRef-old-glib-tests
+ */
+
+#include "libglnx-config.h"
+#include "libglnx.h"
+
+/* Testing g_memdup2() function with various positive and negative cases */
+static void
+test_memdup2 (void)
+{
+  gchar *str_dup = NULL;
+  const gchar *str = "The quick brown fox jumps over the lazy dog";
+
+  /* Testing negative cases */
+  g_assert_null (g_memdup2 (NULL, 1024));
+  g_assert_null (g_memdup2 (str, 0));
+  g_assert_null (g_memdup2 (NULL, 0));
+
+  /* Testing normal usage cases */
+  str_dup = g_memdup2 (str, strlen (str) + 1);
+  g_assert_nonnull (str_dup);
+  g_assert_cmpstr (str, ==, str_dup);
+
+  g_free (str_dup);
+}
+
+int main (int argc, char **argv)
+{
+  g_test_init (&argc, &argv, NULL);
+  g_test_add_func ("/strfuncs/memdup2", test_memdup2);
+  return g_test_run();
+}